In "The Hand That Rocks the Mabel," Mabel asks Wendy if she has ever dumped a boy.
Wendy begins to list all the boys she's broken up with, and is so busy doing so that she doesn't notice Mabel leaving.
She watches Dipper as he does the Lamby Lamby Dance to please Ma and Pa.
After the ghosts leave and her friends are returned, she keeps Dipper's secret about the dance, instead telling her friends that he attacked the ghosts with a baseball bat.
Later, she allows Dipper and Mabel to come along with her and her friends to the abandoned Dusk 2 Dawn.Back at the Mystery Shack, she tells them both an anecdote, stopping midway to pick up her dropped hairbrush, and thus being oblivious to the threatening gestures Dipper and Robbie make at each other.In "Summerween," Wendy comes to the Mystery Shack with Robbie to get her coat.Later in the episode she gives Dipper the keys to the Mystery Cart and tells him to "Try not to hit any pedestrians." She is later seen working at the ticket stand with Dipper in "Headhunters," saying that Stan probably bribed people to come see the grand unveiling of Wax Stan.She and Dipper share a laugh after revealing to each other that they were both bribed to attend. Fun loving and rebellious, she frequently shirks responsibility for activities she finds more enjoyable, such as hanging out with her rambunctious friends or going on adventures with Dipper and Mabel Pines. In "Tourist Trapped," Wendy makes her debut when Stan asks her to put up some signs advertising the Mystery Shack in the "spooky" part of the woods.